I think they gave up more than that, but not Middlebrooks + Bogaerts more. Entering the season Bogaerts was ranked #58 in BA's top 100 prospects, where as Marisnick was ranked #67.

I will say that I thought the Marlins did a lot better when Arencibia and Gose were mentioned as part of the deal, but neither were part of the final version of the deal. Toronto managed to keep a lot of key prospects including D'Arnaud, who would have stepped in for Arencibia and may have been more productive offensively. Knowing that they have the surplus of C's, I could see them continuing to shop Arencibia to try to round out their roster, which could be what puts them over the top.

The deal definitely makes the Blue Jays more interesting for the time being, no question about that.